Two hydraulic cylinders on each side of the device move the jaws and this movement is synchronized to ensure that the load is always balanced.
Each cylinder is fitted with an over-center check valve to
protect against hydraulic hose failure or leakage within the connections to the host machine.
Replaceable urethane-coated pads are fitted to the contact faces of the jaws and to the support frame. These durable pads allow the grab to exert a high grip force on the sleepers without risk of damage to
the concrete surfaces.
A steel plate below the sleeper ends further secures the sleepers in the event of inadequate pressure from the host machine.